JPH0447930Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to improvements in electromagnet assemblies used in solenoids and the like.

(B) Prior art An electromagnet assembly used in a solenoid incorporated in a solenoid valve, etc. usually consists of an annular coil formed by winding the outer periphery of a coil bobbin, and a ring-shaped coil that is fitted into one end of the coil. The coil is equipped with a fixed iron core and a U-shaped frame made of magnetic material provided outside the coil. In such electromagnet assemblies, the conventional method for integrally assembling the coil, fixed core, and frame is to prevent the fixed core from slipping out of the coil with a frame, and to press the core member against the free end of the frame from the outside of the coil. The core member is fixed to the frame by screwing, caulking, welding, etc.

Further, in a solenoid valve incorporating such an electromagnet assembly, the electromagnet assembly and other components of the electromagnetic valve are integrally assembled by screwing, caulking, welding, or the like.

However, electromagnet assemblies or solenoid valves that are assembled using such conventional methods require specific tools during assembly or disassembly, and the operation is laborious and time-consuming.

(c) Problems to be solved by the invention The problem to be solved by the invention is to make it easier to assemble and disassemble the electromagnet assembly by improving the method of fixing the core member to the frame. be.

(d) Means for Solving the Problems The present invention involves inserting an annular coil having a bobbin and a winding wire into a substantially U-shaped frame made of magnetic material, one end of which ends with a pair of free ends. In an electromagnet assembly in which a fixed iron core is fitted into a coil and the frame and the fixed iron core are integrally fixed by a core member on the free end side of the frame, there is a magnet in the width direction of the frame near the free end of the frame. A pair of protrusions are formed on the outer peripheral edge of the core member to fit into the slits of the frame, and the core member is rotated approximately about the centerline of the coil to remove the protrusions. It is configured to be inserted into the slit.

The present invention also provides an electromagnet assembly having the above structure, in which a spring washer may be provided between the coil and the core member, and one end of the slit is opened in one side of the frame, and a step is formed in the opening. Further, a valve port and a valve seat may be integrally formed on the bobbin so as to be separated from each other in the axial direction from the fixed iron core, and the coil may be energized between the valve seat and the fixed iron core. A moving plunger may also be provided.

(e) Effect When assembling the electromagnet assembly with the above configuration as one unit, fit the fixed core into the coil, cover the outside of the coil from the fixed core side with a frame, and place the core member on the free end of the frame. and rotate the core member so that the protrusion of the core member enters the slit in the frame. Thereby, the frame, coil, and fixed core are held integrally.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2, an embodiment of the electromagnet assembly according to the present invention is shown incorporated into a solenoid valve 1. As shown in FIGS. In the figure, 2 is a substantially U-shaped frame made of magnetic material with one end (lower end in Figure 1) being a free end, and 3 is made of non-magnetic material such as synthetic resin. A bobbin 31 and an annular coil having a winding 32 around the outer periphery of the bobbin, 4 is a fixed iron core fitted to one end (the upper end in FIG. 1) of the coil.

As is clear from FIG. 3, a hole 22 is formed in the middle part 21 of the other end (upper end in FIG. 1) of the frame 2, and a hole 22 is formed in the vicinity of the pair of free ends 23 in the axial direction of the frame. Center line 0 over about half the distance
-0 (FIG. 2), a slit 24 is formed extending toward one side edge and penetrating inwardly and outwardly. The slit 24 near each free end has a third
As is clear from the figure, they are arranged symmetrically with respect to the axis of the hole 22. Each slit 24 is open at its side edge, and a stepped portion 25 is formed at the open end 26 to make it narrower.

A pair of flanges 33 and 34 are integrally formed on the bobbin 31 and spaced apart in the axial direction, and a winding wire 32 is provided between the flanges. The bobbin 31 is further integrally formed with a tubular portion 35 that protrudes downward from one (lower side in FIG. 1) flange 34.
A valve port 36 is formed at the tip of the tubular portion 35 to communicate the inside and outside of the bobbin. A valve seat 37 is formed around the inside of the valve port 36.

The fixed iron core 4 is made of a magnetic material, and has a through hole 41 formed in the center thereof passing through in the axial direction.
There is a flange 4 located approximately in the center on the outer periphery of the fixed core.
2 is formed. This flange 42 is adapted to come into contact with one end (the upper end in FIG. 1) of the bobbin 31 when the fixed iron core 4 is fitted into the bobbin 31.

A plunger 5 is movably provided in the bobbin 31 between the fixed iron core 4 and the valve seat 37, and a valve body 6 that engages with the valve seat is fixed to the end face of the plunger on the valve seat side. . The plunger 5 is constantly pressed toward the valve seat by a spring 7.

A core member 8 that integrally fixes the coil and the fixed iron core to the frame 2 is fitted adjacent to the flange 34 of the bobbin 31. This core member 8 is made of a magnetic plate material and has a planar shape as shown in FIG. 4, and has a hole 81 formed in the center thereof into which the tubular portion 35 of the bobbin 31 is inserted. The outer periphery of the core member includes a pair of arcuate portions 82 extending over approximately 90°, a pair of flat portions 83, and a pair of protruding portions 84.
are formed symmetrically with respect to the center of the hole 81. In this embodiment, the thickness of the protruding portion 84 is the same as the thickness of the other portions of the core member, and is slightly smaller than the width w of the open end 26 of the slit 24 of the frame 2, so that the protruding portion is It is designed to be inserted through the end into the slit. Further, the length l ₁ of the protruding portion 83 is approximately the same as or slightly smaller than the length l ₂ from the back of the slit to the stepped portion. The radius of curvature of the arcuate portion 82 is set to be smaller than half of the distance L between the pair of free ends 23 of the frame in order to prevent rotation of the core member about the center of the hole 81 as the rotation axis from being hindered by the frame. There is. Note that this arc-shaped portion may be formed into a straight line as long as it does not hinder the rotation of the core member. A spring washer 9 is arranged between the flange 34 of the bobbin 31 and the core member 8 to bias the core member 8 away from the flange 34.

When assembling the electromagnet assembly of the above embodiment together with a solenoid valve, first, inside the bobbin 31 of the coil 3 are the plunger 5 to which the valve body 6 is attached, and the spring 7.
After inserting the fixed core 4, the fixed core 4 is fitted into one end (the upper end in FIG. 1) until its flange 42 abuts. Next, the outer end of the fixed core is inserted into the hole 22, and the frame 2 is placed over the outer side of the coil 3 as shown in FIG. At this time, the flange 42 of the fixed core 4
is sandwiched between the bobbin 31 and the frame 2. Thereafter, the core member 8 is attached to the outside of the tubular portion 35 of the bobbin 31.
The core member is inserted between the pair of free ends 23 of the frame 2 with the arcuate portion 82 and flat portion 83 facing the free ends, as shown in FIG. 4 [A].

After that, while pushing the core member 8 against the spring washer 9 toward the bobbin flange 84, as shown in FIG.
rotate in a clockwise direction around the tubular section as shown. The protrusion 84 then enters the slit 24 through the narrowed open end 26. When the core member is rotated approximately 90 degrees, the protrusion 84 enters completely within the slit 24, as shown in FIG. 5B.
It is pushed away from the flange 34 by the spring washer 9, and its side edge abuts the step 35 of the slit, preventing the core member from rotating in the opposite direction. Therefore, the assembled state of the solenoid valve is maintained as it is.

When disassembling the solenoid valve 1, push the core member against the spring washer 9 in a counterclockwise direction (the fifth
) in figure [B], and insert the protrusion 84 into the slit 2.
All you have to do is move it completely outside of 4.

In the above electromagnetic valve, when the coil 32 is not energized, the plunger 5 and the valve body 6 are pushed by the spring 7, and the valve body 6 comes into contact with the valve seat 37, causing the valve port 36 to come into contact with the valve seat 37.
is closed. Next, when the coil 32 is energized, the plunger 5 is attracted toward the fixed iron core 4, so the valve body 6 separates from the valve seat 37 and opens the valve port 36. Therefore, fluid flows from the through hole 41 of the fixed core 4 through the bobbin to the valve port 36.

In the above embodiments, the electromagnet assembly is incorporated into a solenoid valve, but the electromagnet assembly may be used alone or incorporated into a solenoid.

(G) Effects According to the present invention, no special tools are required for assembling and disassembling the electromagnet assembly, so it can be easily assembled and disassembled anytime and anywhere.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a solenoid valve incorporating the electromagnet assembly of the present invention, Figure 2 is a side view of the solenoid valve of Figure 1, Figure 3 is a perspective view of the frame, and Figure 4 is a plan view of the core member. Figures 5 [A] and [B] are end views of the solenoid valve of Figure 1 with one free end of the frame cut at the slit position, showing different set positions of the core member. be. 2... Frame, 24... Slit, 3... Coil, 31... Bobbin, 32... Winding wire, 4... Fixed iron core, 8... Core member, 9... Spring washer.

Claims (1)

[Claims for Utility Model Registration] 1. An annular coil having a bobbin and a winding wire is inserted into a substantially U-shaped frame made of magnetic material, one end of which ends with a pair of free ends, and a fixed iron core is inserted into the coil. In an electromagnet assembly in which the frame and fixed iron core are fixed together by a core member on the free end side of the frame, a slit extending in the width direction of the frame is formed near the free end of the frame. A pair of protrusions that fit into the slit of the frame are formed on the outer peripheral edge of the core member, and the core member is rotated approximately around the center line of the coil to insert the protrusions into the slit. An electromagnet assembly characterized by being configured as follows. 2. The electromagnet assembly of claim 1, further comprising a spring washer between the coil and the core member. 3. The electromagnet assembly according to claim 1 or 2, wherein one end of the slit is opened at one side of the frame, and a stepped portion is formed at the opening. 4. Claim 1, wherein a valve port and a valve seat are integrally formed on the bobbin so as to be separated from the fixed iron core in the axial direction, and a plunger is provided between the valve seat and the fixed iron core, and which moves when the coil is energized. , 2 or 3.